Exam-style question
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Describe how gamma photons are localised in a gamma camera.
Model answer
What a good answer should say
- Gamma photons are localised in a gamma camera by determining the position of the scintillation event within the crystal.
- The signals from multiple photomultiplier tubes are used to triangulate the source of the gamma photon, allowing for accurate imaging of the distribution of the radioactive tracer.
Explanation
Why this works
This answer effectively explains the localisation process of gamma photons, emphasizing the triangulation method used with photomultiplier tubes. The question assesses the understanding of how images are formed based on the detection of gamma radiation.
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